THA

Adjustable Truss Hanger

The THA is a one-piece joist hanger supporting trussed rafters and composite
timbers from timber members.
The THA can be installed with a number of fixing options, for greater load
capacity. See table below for fixing options.
Available in seat widths from 38mm to 100mm.

Location tab allows easier alignment to the carrying member.
Choice of installation specifications to suit wrap-over or face fix.
Speed prongs enable positioning of the hanger without nails before completing the install.
Nailing schedules are stamped into the strap to provide the correct information to site operatives.
The distinctive wide strap enhances the performance of the critical part of the connection by increasing the nail spacing and providing greater bearing area on the supporting girder.

Technical Data Sheet

CE Marking

Product Details

Images

THA configurations.

C_DOUBLESHEAR_InstSeq_Ill_Inst_Double-shear-nailing_C0.jpg

Features

Material

Pre-galvanised mild steel

Application

Suitable On

Solid sawn timber
Engineered timber

When to Use

Trusses
Joists

Technical Data

Dimensions

Product Dimensions

References	Joist dimensions - face fix [mm]		Joist dimensions - wrap over _{(N3.75x30 joist nails or N3.75x75 Double Shear Joist Nails)} [mm]		Joist dimensions - wrap over _{(N3.75x75 Nails throughout)} [mm]		Product Dimensions [mm]							Header holes	Joist holes
	Header		Header		Header		A	B	C	D	E	F	t	Ø4.1	Dome nail holes
	Min	Max.	Min	Max.	Min	Max.	A	B	C	D	E	F	t	Ø4.1	Dome nail holes
THA38	38	197	38	122	38	147	38	226	62.5	59.5	114	64.5	1.2	22	6
THA44	44	197	44	122	44	147	44	223	62.5	59.5	111	64.5	1.2	22	6
THA50	50	197	50	122	50	147	50	220	62.5	59.5	108	64.5	1.2	22	6
THA75	75	197	75	122	75	147	75	232.5	62.5	59.5	120	64.5	1.2	22	6
THA100	100	197	100	122	100	147	100	220	62.5	59.5	108	64.5	1.2	22	6

Product capacities - Timber to timber - Face fix installation

References	Number of Fasteners				Characteristic Capacities [kN]		Safe working loads - C27/TR26 [kN]
	Header		Joist		R_1.k	R_2.k	R_{1,SWL,Long Term}	R_{1,SWL,Medium Term}	R_{2,SWL,Short Term}
	Qty	Type	Qty	Type	C27/TR26	N3.75x30	N3.75x30	N3.75x30	N3.75x30
	Qty	Type	Qty	Type	N3.75x30	N3.75x30	N3.75x30	N3.75x30	N3.75x30
THA38	20	*	6	N3.75x30	12.4	3.7	5.2	5.9	1.9
THA44	20	*	6	N3.75x30	12.4	3.7	5.2	5.9	1.9
THA50	20	*	6	N3.75x30	12.4	3.7	5.2	5.9	1.9
THA75	20	*	6	N3.75x30	12.4	3.7	5.2	5.9	1.9
THA100	20	*	6	N3.75x30	12.4	3.7	5.2	5.9	1.9

* Refer to capacity table columns for type of fasteners that can be used on header. Capacities depending on fastener type.

Product capacities - Timber to timber - Face fix installation (Double Shear Joist Nails)

References	Number of Fasteners				Characteristic capacities - Timber C27/TR26 [kN]		Safe working loads - C27/TR26 [kN]
	Header		Joist		R_1.k	R_2.k	R_{1,SWL,Long Term}	R_{1,SWL,Medium Term}	R_{2,SWL,Short Term}
	Qty	Type	Qty	Type	N3.75x30	N3.75x30	N3.75x30	N3.75x30	N3.75x30
THA38	20	N3.75*	6	N3.75x75	15.4	5.3	6.4	7.3	2.7
THA44	20	N3.75*	6	N3.75x75	15.4	5.3	6.4	7.3	2.7
THA50	20	N3.75*	6	N3.75x75	15.4	5.3	6.4	7.3	2.7
THA75	20	N3.75*	6	N3.75x75	15.4	5.3	6.4	7.3	2.7
THA100	20	N3.75*	6	N3.75x75	15.4	5.3	6.4	7.3	2.7

* Refer to capacity table columns for type of fasteners that can be used on header. Capacities depending on fastener type.

Product capacities - Timber to timber - Face fix installation (N3.75x75 Nails throughout)

References	Number of Fasteners		Characteristic capacities - C27/TR26 [kN]		Safe working Loads - C27/TR26 [kN]
	Header	Joist	R_1,k	R_2,k	R_{1,SWL,Long Term}	R_{1,SWL,Medium Term}	R_{2,SWL, Short Term}
	Qty	Qty	N3.75x75	N3.75x75	N3.75x75	N3.75x75	N3.75x75
THA50	26	6	20.46	5.3	8.6	9.8	2.7
THA100	26	6	20.46	5.3	8.6	9.8	2.7

Product capacities - Timber to timber - Wrap over installation

References	Number of Fasteners			Characteristic Capacities [kN]		Safe Working Loads - C27/TR26 [kN]
	Header		Joist	R_1,k	R_2,k	R_{1,SWL,Long Term}	R_{1,SWL,Medium Term}	R_{2,SWL,Short Term}
	Top	Face	Qty	C27/TR26	N3.75x30	N3.75x30	N3.75x30	N3.75x30
	Qty	Qty	Qty	N3.75x30	N3.75x30	N3.75x30	N3.75x30	N3.75x30
THA38	4	8	6	10.5	3.7	4.4	5	1.9
THA44	4	8	6	10.5	3.7	4.4	5	1.9
THA50	4	8	6	10.5	3.7	4.4	5	1.9
THA75	4	8	6	10.5	3.7	4.4	5	1.9
THA100	4	8	6	10.5	3.7	4.4	5	1.9

Product capacities - Timber to timber - Wrap over installation (Double Shear Joist Nails)

References	Number of Fasteners						Characteristic capacities - C27/TR26 [kN]		Safe Working Loads - C27/TR26 [kN]
	Header				Joist		R_1,k	R_2,k	R_{1,SWL,Long Term}	R_{1,SWL,Medium Term}	R_{2,SWL,Short Term}
	Top		Face		Qty	Type	N3.75x30	N3.75x30	N3.75x30	N3.75x30	N3.75x30
	Qty	Type	Qty	Type	Qty	Type	N3.75x30	N3.75x30	N3.75x30	N3.75x30	N3.75x30
THA38	4	N3.75*	8	N3.75*	6	N3.75x75	16.4	5.3	6.8	7.8	2.7
THA44	4	N3.75*	8	N3.75*	6	N3.75x75	16.4	5.3	6.8	7.8	2.7
THA50	4	N3.75*	8	N3.75*	6	N3.75x75	16.4	5.3	6.8	7.8	2.7
THA75	4	N3.75*	8	N3.75*	6	N3.75x75	16.4	5.3	6.8	7.8	2.7
THA100	4	N3.75*	8	N3.75*	6	N3.75x75	16.4	5.3	6.8	7.8	2.7

* Refer to capacity table columns for type of fasteners that can be used on header. Capacities depending on fastener type.

Product capacities - Timber to timber - Wrap over installation (N3.75x75 Nails throughout)

References	Number of Fasteners			Characteristic capacities - C27/TR26 [kN]		Safe Working Load - C27/TR26 [kN]
	Header		Joist	R_1,k	R_2,k	R_{1,SWL,Long Term}	R_{1,SWL,Medium Term}	R_{2,SWL,Short Term}
	Top	Face	Qty	N3.75x75	N3.75x75	N3.75x75	N3.75x75	N3.75x75
	Qty	Qty	Qty	N3.75x75	N3.75x75	N3.75x75	N3.75x75	N3.75x75
THA50	4	14	6	20.46	5.3	8.6	9.8	2.7
THA100	4	14	6	20.46	5.3	8.6	9.8	2.7

Certification

Declaration of Performance (DoP)

uk-dop-e06-0270-issue-6.pdf (97.22 KB)

2018-02-16

uk-dop-e06-0270-issue-5.pdf (42.13 KB)

2017-05-02

uk-dop-e06-0270-issue-4.pdf (42.18 KB)

2015-08-04

75780fe8534b90ce48aebde45823ff74574278a8-pdf.pdf (34.34 KB)

2013-06-20

995c4380357c32ba7cedd75630244e75762cfbf9.pdf (34.88 KB)

2013-03-01

25094a836344f558ba0765b8df770af81e7c45a7.pdf (31.95 KB)

European Technical Assessment (ETA)

eta-060270-sst-rev-9-2024.pdf (14.09 MB)

Select one of our Websites

Connectors for Masonry, Timber and Steel Construction

Nails and Screws

Quik Drive® Collated Screw System

Masonry/Concrete Anchor Systems

Product Details

Images

Features

Material

Application

Suitable On

When to Use

Technical Data

Dimensions

Product Dimensions

Product capacities - Timber to timber - Face fix installation

Product capacities - Timber to timber - Face fix installation (Double Shear Joist Nails)

Product capacities - Timber to timber - Face fix installation (N3.75x75 Nails throughout)

Product capacities - Timber to timber - Wrap over installation

Product capacities - Timber to timber - Wrap over installation (Double Shear Joist Nails)

Product capacities - Timber to timber - Wrap over installation (N3.75x75 Nails throughout)

Installation

Installation

Installation

Certification

Declaration of Performance (DoP)

European Technical Assessment (ETA)

THA100

THA38

THA44

THA50

THA75

THA100

THA38

THA44

THA50

THA75

2D

3D/3D Simplified

About Simpson Strong-Tie®

Simpson Strong-Tie U.K.

Phone

Fax

Email

Website

Copyright (en-UK)